<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogRoles = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand" width="50">
          <template slot-scope="scope">
            <el-row
              :class="[
                'bdbottom',
                index1 === 0 ? 'bdtop' : 'bdbottom',
                'vcenter',
              ]"
              v-for="(item1, index1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5"
                ><el-tag closable>{{ item1.authName }}</el-tag
                ><i class="el-icon-caret-right"></i
              ></el-col>
              <!-- 渲染二级/三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[index2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, index2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 渲染二级权限 -->
                  <el-col :span="6"
                    ><el-tag type="success" closable>{{
                      item2.authName
                    }}</el-tag
                    ><i class="el-icon-caret-right"></i
                  ></el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      v-for="(item3, index3) in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeRolesById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-s-tools"
              @click="showSetRolesDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 修改角色信息的对话框 -->
    <el-dialog title="修改角色信息" :visible.sync="addDialogRoles" width="30%">
      <span>这是一段信息</span>
      <span slot="footer">
        <el-button @click="addDialogRoles = false">取 消</el-button>
        <el-button type="primary" @click="addDialogRoles = false"
          >确 定</el-button
        >
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRolesDialogVisible"
      width="50%"
      @close="setRightDialogClose"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defkeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //修改角色信息的对话框
      addDialogRoles: false,
      //分配权限的对话框
      setRolesDialogVisible: false,
      //所有权限的数据
      rightslist: [],
      //树形绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      //默认选中的节点
      defkeys: [],
      //当前即将分配权限的角色id
      roleId: undefined,
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status != 200) return this.$message.error('获取列表失败！')
      this.rolelist = res.data
    },
    //根据Id 删除对应权限
    async removeRolesById(role, rightId) {
      //弹框是否删除
      const confirmRoles = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmRoles != 'confirm') return this.$message.info('取消删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status != 200) {
        return this.$message.error('删除权限失败！')
      }
      role.children = res.data
      this.$message.success('删除成功！')
    },
    //展示分配权力的对话框
    async showSetRolesDialog(role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status != 200)
        return this.$message.error('获取权限数据失败！')
      //把获取的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)

      //递归获取三级节点的Id
      this.getLeafKeys(role, this.defkeys)

      this.setRolesDialogVisible = true
    },
    //通过递归的形式，获取角色下所有三级权限的id，并保存到 defkeys 数组中
    getLeafKeys(node, arr) {
      //如果当前 node 节点不包含 children 属性 ，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },
    setRightDialogClose() {
      this.defkeys = []
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status != 200) return this.$message.error('分配权限失败！')
      this.$message.success('分配权限成功！')
      this.getRoleList()
      this.setRolesDialogVisible = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>